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Graphene for Supercapacitors

  • September 2014
  • -
  • Cientifica ltd
  • -
  • 41 pages


Almost from the moment graphene was first successfully synthesized back in 2004, researchers around the world have envisioned its use for the electrodes of supercapacitors.

Supercapacitors, or ultracapacitors, or for the more technically inclined, electrochemical double layer capacitors (EDLCs), are a kind of hybrid between a capacitor and electrochemical batteries, like lithium ion (Li-ion) batteries. They can deliver an enormous amount of power very quickly, a capability known as power density (the maximum amount of power that can be supplied per unit mass), like a capacitor. But unlike capacitors, they can store that power for longer, a capability known as energy density (the amount of energy stored per unit mass).

In order for supercapacitors to store more electricity to start approaching the energy density of an electrochemical battery you need to increase the surface area of the electrodes. It is here on the electrodes that the electrical charge is stored via something akin to static electricity. The more surface area you can give the electrodes, the more electricity can be stored in the supercapacitor.

While research continues to see if graphene can be used to produce the long charge times for supercapacitors so sought after by all-electric vehicle enthusiasts, graphene does have other properties that could prove to be very attractive for other applications. For one, its high electrical conductivity is significantly better than activated carbon, which could open up applications in electronics. It also can be made into a structure unlike activated carbon, which is just sort of lumped together. With its ability to be structured, graphene has another attractive property for electronic applications in which it could be designed into electronic components.

This report looks at the strengths and weaknesses of graphene in supercapacitor applications and how those stack up against established materials and other potential materials being experimented with for supercapacitor applications.

To accomplish this aim this report looks at how supercapacitors are currently produced, who produces them and who among those producers appear to taking the prospects of graphene seriously. We also look at graphene manufacturing and the methods are best suited for leading to a material for the electrodes of supercapacitors.

Table Of Contents

Graphene for Supercapacitors
Table of Contents

Companies Mentioned In This Report 5
Introduction 6
Graphene's Properties Prove Attractive for Electronics 6
The Dream of Supercapacitor-enabled All-Electric Vehicles 6
Key Findings 8
Background 9
Role of Graphene in Supercapacitors 11
Research Results with Graphene and Capacitance 12
Obstacles in Translating Surface Area to Capacitance for Graphene 13
Advantages of Graphene for Supercapacitors 13
Ten-Year Market Forecast For The Overall Supercapacitor Industry 13
Segmentation of the supercapacitor industry 16
Applications In Each Category 16
Electronics 16
Consumer Electronics 16
Professional Electronics 17
Energy 17
Automated Meter Readings 17
Medium-sized Wind Turbines 17
Uninterruptible Power Supplies (UPS) 17
Power Lines 17
Transportation 17
Other 18
Aviation 18
Military 18
Future Applications 18
List of electrode materials used in supercapacitors 18
Insights into supercapacitor bill of materials (BoM) cost structure 20
Components 20
Costs Associated with EDLC Manufacturing 20
Manufacturing methods 21
Plasma 1 Approach 23
Plasma Approach 2 24
Liquid Phase Exfoliation 24
Oxidation Reduction 25
Chemical Vapor Deposition 26
Preferred form of graphene for supercapacitors 27
Analysis of key points-of-pain and what graphene composite material would have to achieve to solve these 27
Key challenges facing graphene uptake in the supercapacitor industry 28
Graphene Companies Actively Targeting The Supercapacitor Industry 29
Angstron Materials LLC 29
Bluestone Global Tech 30
Catalyx Nanotech Inc. (CNI) 30
Applied Graphene Materials 31
Grafen 31
Graphenea 31
Graphene Laboratories Inc. 32
Graphene Technologies 32
Haydale Graphene Industries plc 33
Lomiko Metals Inc. 33
Nanoinnova 34
University of Cambridge 34
Vorbeck 35
XG Sciences 35
Xolve 35
List of supercapacitor manufacturers globally 36
Profiles of Supercapacitor Manufacturers 41

List of Tables and Figures

Figure 1: Schematic of Supercapacitor Design 9
Table 1: Specific Energy Density Watt-hour/Kilogram (Wh/kg) 12
Table 2: Supercapacitors market--electrical applications 15
Table 3: Supercapacitors market--electronic applications 15
Figure 2: Breakdown of EDLC Capacitor Markets by Segment and Applications 16
Table 4: Summary of Graphene Manufacturing Techniques for Supercapacitors 22
Table 5: Plasma Graphene Companies 24
Table 6: Liquid Phase Exfoliation Companies 25
Table 7: Oxidation Reduction Companies 25
Table 8: CVD Graphene Companies 26
Figure 3: Types of Products Supercapacitor Suppliers Manufacture 37
Table 9: Leading Suppliers of Supercapacitors Related to Graphene 37
Table 10: Full List of Supercapacitor Suppliers 38

Companies Mentioned

Ada Technologies
Advanced Capacitor Technologies
Angstron Materials LLC
Applied Graphene Materials
Asahi Kasei-FDK
Baoding Yepu New Energy
Beijing HCC Energy Tech
Bluestone Global Tech
Catalyx Nanotech Inc. (CNI)
Chaoyang Liyuan New Energy
Cooper Bussmann
Cornell Dubilier
Daying Juneng Technology and Development
Dongguan Amazing Electronic
Dongguan Fuhui Electronics Sales
Dongguan Gonghe Electronics
East Penn Manufacturing Co.
Evans Capacitor Company
FastCAP Systems
FDK Corp
Furukawa Battery Co
Graphene Energy Inc
Graphene Laboratories Inc.
Graphene Technologies
Harbin Jurong Newpower
Haydale Graphene Industries plc
Heter Battery
Illinois Capacitor
JM Energy Corp
Lomiko Metals Inc.
LS Mtron
Maxwell Technologies
Meidensha Corp.
Nanotecture (now only licensing)
Nanotune Technologies
NEC Tokin
Nesscap Energy Inc
Nippon Chemi-con
Paper Battery Company
Quantum Wired
Ryan Technology
Shanghai Aowei Technology Development
Shanghai Green Tech
Shenzhen Forecon Super Capacitor Technology
Sino Power Star
Skeleton Technologies
Taiyo Yuden
University of Cambridge
Vina Technology Co
WIMA Spezialvertrieb Elektronischer Bauelemente
XG Sciences

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